별 그리기 썸네일형 리스트형 수학으로 별그려보아요!~ 별그리기!~ 스페셜!!! Hypotrochoid, トロコイド Hypotrochoid From Wikipedia, the free encycloped The red curve is a hypotrochoid drawn as the smaller black circle rolls around inside the larger blue circle (parameters are R = 5, r = 3, d = 5). A hypotrochoid is a roulette traced by a point attached to a circle of radius r rolling around the inside of a fixed circle of radius R, where the point is a distance d from the center of the interior c.. 더보기 이전 1 다음